/etc/xrdp/reconnectwm.sh does not work

[Mingun]

xrdp version

0.9.24

Detailed xrdp version, build options

$ xrdp --version
xrdp 0.9.24
  A Remote Desktop Protocol Server.
  Copyright (C) 2004-2020 Jay Sorg, Neutrino Labs, and all contributors.
  See https://github.com/neutrinolabs/xrdp for more information.

  Configure options:
      --enable-ipv6
      --enable-jpeg
      --enable-fuse
      --enable-rfxcodec
      --enable-opus
      --enable-painter
      --enable-vsock
      --build=x86_64-linux-gnu
      --prefix=/usr
      --includedir=${prefix}/include
      --mandir=${prefix}/share/man
      --infodir=${prefix}/share/info
      --sysconfdir=/etc
      --localstatedir=/var
      --disable-silent-rules
      --libdir=${prefix}/lib/x86_64-linux-gnu
      --libexecdir=${prefix}/lib/x86_64-linux-gnu
      --disable-maintainer-mode
      --disable-dependency-tracking
      --with-socketdir=/run/xrdp/sockdir
      build_alias=x86_64-linux-gnu
      CFLAGS=-g -O2 -fno-omit-frame-pointer -mno-omit-leaf-frame-pointer -ffile-prefix-map=/build/xrdp-Fn5kxo/xrdp-0.9.24=. -flto=auto -ffat-lto-objects -fstack-protector-strong -fstack-clash-protection -Wformat -Werror=format-security -fcf-protection -fdebug-prefix-map=/build/xrdp-Fn5kxo/xrdp-0.9.24=/usr/src/xrdp-0.9.24-4 
      LDFLAGS=-Wl,-Bsymbolic-functions -flto=auto -ffat-lto-objects -Wl,-z,relro -Wl,-z,now -Wl,--as-needed
      CPPFLAGS=-Wdate-time -D_FORTIFY_SOURCE=3 
      PKG_CONFIG_PATH=/build/xrdp-Fn5kxo/xrdp-0.9.24/pkgconfig

  Compiled with OpenSSL 3.0.13 30 Jan 2024

Operating system & version

Ubuntu 24.04.2 LTS

Installation method

dnf / apt / zypper / pkg / etc

Which backend do you use?

xorg

What desktop environment do you use?

GNOME

Environment xrdp running on

Physical machine, don't know how to check card

What's your client?

mstsc.exe from Windows 10, 19044.6093

Area(s) with issue?

Session manager (sesman)

Steps to reproduce

1. Connect to remote machine (Ubuntu in my case). I have Russian keyboard
2. Close RDP client (mstsc.exe in my case)
3. Connect to remote machine again (Ubuntu in my case)
4. Observe that you cannot write Russian characters because keyboard is missing (while you still can chose another language from the language menu)
5. Run setxkbmap -layout 'us,ru' in the terminal to get keyboard back

✔️ Expected Behavior

After step 3 you should be able to type Russian characters.

❌ Actual Behavior

You are unable to type Russian characters until you manually run setxkbmap -layout 'us,ru'

Anything else?

I found, that losing keyboard is a common problem for xrdp and found an advice on SO to put these lines in /etc/xrdp/reconnectwm.sh

#!/bin/sh

# Write procedures here you want to execute on reconnect
setxkbmap -layout 'us,ru'

But the layout still missing after reconnect. According to /var/log/xrdp-sesman.log this script tries to run.

/var/log/xrdp.log. My user name on Ubuntu side is mingun

xrdp settings is default: xrdp-config-files.zip

[matt335672]

A couple of possibilities to check:-

1. Try running the script when logged in as the target user from a terminal. Just type /etc/xrdp/reconnectwm.sh and look for errors.
2. Modify the script to generate a log. Try this instead:-

#!/bin/sh

exec >/run/user/$(id -u)/reconnect.log 2>&1
set -x

# Write procedures here you want to execute on reconnect
setxkbmap -layout 'us,ru'

after a reconnect, see if there's anything in /run/user/$(id -u)/reconnect.log

[Mingun]

When I manually run script, the layout is restored as expected, there is no output:

$ /etc/xrdp/reconnectwm.sh

I added logging as you suggested, and after reconnect log file is created with the following output:

$ cat /run/user/$(id -u)/reconnect.log
cat: /run/user/1000/reconnect.log: Нет такого файла или каталога

Reconnect...

$ cat /run/user/$(id -u)/reconnect.log
+ setxkbmap -layout us,ru

But the layout is still missed

[matt335672]

It's possible there's a race under xrdp v0.9.x because of the way the reconnect is handled. The script may be running before the keyboard layout is sent by the client.

Try adding a sleep 5 to the script before the setxkbmap command. If that works, you should be able to reduce the timeout.

[Mingun]

Thanks, trick with the sleep works.

It's possible there's a race under xrdp v0.9.x because of the way the reconnect is handled.

Do you mean that in v0.10 it is fixed?

[matt335672]

It's the same is v0.10.x as v0.9.x.

We've changed the way it works in devel, but after I've thought about this I don't think that will eliminate the race either. When xrdp connects to the X server and sends the new client information, there's no way for us to tell when the desktop has finished reacting to the X events which are generated.